Simon was then called on stage and asked three questions – to choose the number of a front door on an imaginary house, the colour of the house’s lounge walls and the name of a celebrity sitting inside it.

The media mogul looked sceptical as he wrote down his answers that he had chosen at random in his mind.

When he read out his answers, 717, turquoise and Sir Roger Moore his jaw dropped when he turned to see the act had written the exact same thing has him.